from machine import Pin, I2C
from time import sleep_ms
from hcsr04 import HCSR04
from lcd_api import LcdApi
from pcf8574_lcd import PCF8574_LCD

trigger_pin = Pin(14, Pin.OUT)
echo_pin = Pin(12, Pin.IN)
led_pin = Pin(15, Pin.OUT)

i2c = I2C(1, scl=Pin(22), sda=Pin(21))
lcd = PCF8574_LCD(i2c, 0x27, LcdApi)

sensor = HCSR04(trigger_pin, echo_pin)

lcd.putstr("Distance:")

while True:
    distance = sensor.distance_cm()
    lcd.move_to(0, 1)
    lcd.putstr("{:5.1f} cm   ".format(distance))
    if distance < 10:
        led_pin.value(1)
    else:
        led_pin.value(0)
    sleep_ms(1000)